I have yet to have to truly experience the phenomenon of "circular polarization" while working the FM sats with my Arrow Antenna.... had better luck on the lower passes than the ones which go almost overhead ... maybe the polarization coming into play ...
On EVERY demo - and during every personal/private pass - I'll twist my Arrow 90 degrees. I won;t announce it to the group. I'll just do it. And there is NO discernible change in TX or RX signal by doing so.
Oh, I know the engineers here can SHOW me on paper that the phenomenon is there. But in real life - for ME - it just doesn't happen.
I had one audience member tell me he experiences it during loss of signal more htan at any other time during a pass. And I have to believe him. But please do not let this issue "make or break" any attempt to work an FM bird!